Advice yes of course. I have no problem reading and giving my opinion. What I think of someone else work however hold no authority. So offering it freely might offend someone. Though they put their work out there so.
I have to be honest and say that I would much rather stick to my own work because I lack the ability to clearly illustrate any real knowledge in editing. The story itself, plot, characters, etc... That I will offer my opinion without hesitation.
I wish I had the confidence to help someone else in their editing endeavors.